ministrant
    adj 1: giving practical help to; "a ministering angel"; "the
           angels ministrant sang"; "the attending physician"
    n 1: someone who serves as a minister

Ministrant \Min"is*trant\ (m[i^]n"[i^]s*trant), a. [L.
   ministrans, -antis, of ministrare to minister.]
   Performing service as a minister; attendant on service;
   acting under command; subordinate. "Princedoms and
   dominations ministrant." --Milton. -- n. One who ministers.
   [1913 Webster]